Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/4807#discussion_r144326685
--- Diff: docs/start/building.md ---
@@ -115,19 +115,7 @@ The `-Pvendor-repos` activates a Maven [build
profile](http://maven.apache.org/g
Flink has APIs, libraries, and runtime modules written in
[Scala](http://scala-lang.org). Users of the Scala API and libraries may have
to match the Scala version of Flink with the Scala version of their projects
(because Scala is not strictly backwards compatible).
-**By default, Flink is built with the Scala 2.11**. To build Flink with
Scala *2.10*, you can change the default Scala *binary version* by using
*scala-2.10* build profile:
-
-~~~bash
-# Build with Scala version 2.10
-mvn clean install -DskipTests -Pscala-2.10
-~~~
-
-To build against custom Scala versions, you need to define new custom
build profile that will override *scala.version* and *scala.binary.version*
values.
-
-Flink is developed against Scala *2.11* and tested additionally against
Scala *2.10*. These two versions are known to be compatible. Earlier versions
(like Scala *2.9*) are *not* compatible.
--- End diff --
Yes, I don't explicitly say what we're compatible with now. In fact we only
support 2.11 now, supporting 2.12 is a bit harder than I though.
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